: Models often used the "J" prefix (e.g., J54 instead of Ranger VI). Late 1969/1970 : The neck plate shape changed from square to , and the serial numbers were roughly in the 420,000 range at this time. Late 1970s : Bridges became slimmer and finishes thinner. The "Eko Health" Confusion

Use enthusiast sites like FetishGuitars for visual catalogs.

How to Identify and Price Your Vintage Guitar: A Simple Guide